Merge pull request #24 from amiaopensource/sccyou-ffmpeg

Sccyou ffmpeg

Author: dericed

sccyou

@@ -2,12 +2,13 @@
 # sccyou
 # script to apply the readeia608 filter and interpret the results in order to create an scc (and optionally an srt) output from standard definition video files which contain EIA 608 data
 # thanks to Paul Mahol, Ben Turkus
-# Copyright (c) 2019-2022, Dave Rice, see License.txt
+# Copyright (c) 2019-2024, Dave Rice, see License.txt
 
 VERSION="0.2"
 
 SEARCH_FIRST_X_SECONDS_FOR_CAPTION_LINE=20
 
+SCRIPTDIR="$(dirname "${0}")"
 FFMPEG_INPUT_OPTIONS+=(-v 0)
 FFPROBE_INPUT_OPTIONS+=(-v 0)
 
@@ -44,6 +45,12 @@ $(basename "${0}") ${VERSION}
   Information about the scc format is available at http://www.theneitherworld.com/mcpoodle/SCC_TOOLS/DOCS/
 
   Dependencies: ffmpeg 4.3 or later
+  
+ -F <path> (provide a custom ffmpeg path. ffprobe is presumed to neighbor ffmpeg)
+
+  If an ffmpeg binary is provided with the '-F <path>' option that will be used,
+  else if an ffmpeg binary exists within the same directory of sccyou, that will
+  be used. Else it will use $(which ffmpeg).
 
   How tos:
 
@@ -101,15 +108,15 @@ _hhmmssmmm_to_hhmmssff(){
 }
 
 _get_line(){
-    LINE_SELECT="$(ffmpeg -i "${MOVIE}" -vf "readeia608=lp=1:spw=${SPW},metadata=mode=print:key=lavfi.readeia608.0.line" -t "${SEARCH_FIRST_X_SECONDS_FOR_CAPTION_LINE}" -f null - 2>&1 | grep -o "lavfi.readeia608.0.line=[0-9]*" | cut -d= -f2 | sort | uniq -c | sort -n -r | head -n 1 | awk '{print $2}')"
+    LINE_SELECT="$("${FFMPEG_PATH}" -i "${MOVIE}" -vf "readeia608=lp=1:spw=${SPW},metadata=mode=print:key=lavfi.readeia608.0.line" -t "${SEARCH_FIRST_X_SECONDS_FOR_CAPTION_LINE}" -f null - 2>&1 | grep -o "lavfi.readeia608.0.line=[0-9]*" | cut -d= -f2 | sort | uniq -c | sort -n -r | head -n 1 | awk '{print $2}')"
 }
 
 _get_cc(){
     # this function tests for the presence of caption data on the specified line, if the result is non-empty then there are captions read
     LINE="${1}"
     SPW=0.27
     AMOUNT_TO_REPORT=10
-    CC_SELECT="$(ffmpeg -i "${MOVIE}" -vf "format=rgb24,crop=iw:1:0:${LINE},readeia608=spw=${SPW},metadata=mode=print:key=lavfi.readeia608.0.cc" -t "${SEARCH_FIRST_X_SECONDS_FOR_CAPTION_LINE}" -f null - 2>&1 | grep -o "lavfi.readeia608.0.cc=0x[A-F0-9]*" | cut -d= -f2 | head -n "${AMOUNT_TO_REPORT}" | xargs)"
+    CC_SELECT="$("${FFMPEG_PATH}" -i "${MOVIE}" -vf "format=rgb24,crop=iw:1:0:${LINE},readeia608=spw=${SPW},metadata=mode=print:key=lavfi.readeia608.0.cc" -t "${SEARCH_FIRST_X_SECONDS_FOR_CAPTION_LINE}" -f null - 2>&1 | grep -o "lavfi.readeia608.0.cc=0x[A-F0-9]*" | cut -d= -f2 | head -n "${AMOUNT_TO_REPORT}" | xargs)"
 }
 
 _get_caption_settings(){
@@ -168,7 +175,7 @@ _end_scc(){
     echo >> "${SCC_OUT}"
 }
 
-while getopts ":hsyo:l:t:v" OPT ; do
+while getopts ":hsyo:l:t:vF:" OPT ; do
     case "${OPT}" in
         h) _usage ; exit 0 ;;
         s) SRT_OUTPUT="y" ;;
@@ -177,20 +184,37 @@ while getopts ":hsyo:l:t:v" OPT ; do
         l) LINE_SELECT_USER="${OPTARG}" ;;
         t) SEARCH_FIRST_X_SECONDS_FOR_CAPTION_LINE="${OPTARG}" ;;
         v) unset FFMPEG_INPUT_OPTIONS ; unset FFPROBE_INPUT_OPTIONS ;;
+        F) FFMPEG_PATH="${OPTARG}" ;;
         *) echo "bad option -${OPTARG}" ; _usage ; exit 1 ;;
     esac
 done
 shift $(( OPTIND - 1 ))
 
+# if FFMPEG_PATH wasn't provided as an argument then see if one is installed
+if [[ -z "${FFMPEG_PATH}" ]] ; then
+    FFMPEG_GUESS="${SCRIPTDIR}/ffmpeg"
+    if [[ -x "${FFMPEG_GUESS}" ]] ; then
+        FFMPEG_PATH="${FFMPEG_GUESS}"
+    else
+        FFMPEG_PATH="$(which ffmpeg)"
+    fi
+fi
+FFPROBE_GUESS="$(dirname "${FFMPEG_PATH}")/ffprobe"
+if [[ -x "${FFPROBE_GUESS}" ]] ; then
+    FFPROBE_PATH="${FFPROBE_GUESS}"
+else
+    FFPROBE_PATH="$(which ffprobe)"
+fi
+
 FFMPEG_INPUT_OPTIONS+=(-hide_banner)
 FFPROBE_INPUT_OPTIONS+=(-hide_banner)
 
-if [[ "${@}" == "" ]] ; then
+if [[ "${*}" == "" ]] ; then
     _usage
     exit
 fi
 
-while [[ "${@}" != "" ]] ; do
+while [[ "${*}" != "" ]] ; do
     MOVIE="${1}"
     if [[ -n "${OUTPUT_DIR}" ]] ; then
         MOVIE_BN="$(basename "${MOVIE}")"
@@ -258,12 +282,12 @@ while [[ "${@}" != "" ]] ; do
             PREV_CC="8080"
         fi
         PREV_SECS="$SECS"
-    done < <(ffprobe "${FFPROBE_INPUT_OPTIONS[@]}" -sexagesimal -f lavfi -i movie="${MOVIE},format=rgb24,crop=iw:1:0:${LINE_SELECT},readeia608=lp=1:spw=${SPW}" -show_entries frame=best_effort_timestamp_time:frame_tags=lavfi.readeia608.0.cc -of csv)
+    done < <("${FFPROBE_PATH}" "${FFPROBE_INPUT_OPTIONS[@]}" -sexagesimal -f lavfi -i movie="${MOVIE},format=rgb24,crop=iw:1:0:${LINE_SELECT},readeia608=lp=1:spw=${SPW}" -show_entries frame=best_effort_timestamp_time:frame_tags=lavfi.readeia608.0.cc -of csv)
     TRANSITION_TIME="$(_hhmmssmmm_to_hhmmssff "${PREV_SECS}")"
     _report -d "${CC_LOG} - ${TRANSITION_TIME}."
     _end_scc
     if [[ "${SRT_OUTPUT}"  == "y" ]] ; then
-        ffmpeg "${FFMPEG_INPUT_OPTIONS[@]}" -i "${SCC_OUT}" "${SRT_OUT}"
+        "${FFMPEG_PATH}" "${FFMPEG_INPUT_OPTIONS[@]}" -i "${SCC_OUT}" "${SRT_OUT}"
     fi
 
     _report -d "Done with ${MOVIE}. We hope you like ${SCC_OUT}."